When these words pop into your head:

"Thinkin' of you's workin' up my appetite / Looking forward to a little afternoon delight / Rubbin' sticks and stones together makes the sparks ignite / And the thought of lovin' you is getting so exciting." Then you're in love.


But in all seriousness, you will just know. You will suddenly realize, "I love this person. I just love them." You will want to hold them more than ever.